Mechanism for knitting-machines



(ModeL) W H. PEARSON 82; J. BRADLEY.

THREAD GUIDE MECHANISM FOR KNITTING MACHINES.

No. 258,224. Patented Feb-7,1882.

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WILLIAM H. PEARSON AND JOHN BRADLEY, OF LOlVELL, MASS.

THREAD-GUIDE MECHANISM FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 253,224, dated February 7, 1852.

Application filed August 10, 1878. Renewed September 24, 1881. (Model.)

1 F all whom it may concern:

Be it known that we, WILLIAM H. PEAR soN and J OI-IN BRADLEY, both of Lowell, in he county of Middlesex and Commonwealth of Massachusetts, have invented certain Improvements in Knitting-Machines, which improvements are fully set forth in the following i specification, reference being had to the accompany drawings.

()ur invention consists in the combination, with a loop-wheel provided with two sets of nibs, ot a yarn-guide provided with a slot, a lever provided with a pin, and acam to shift the yarn from one set of nibs to the other set; also, in the combination of aloop-wheel, ayarn guide, a stud, and a bracket adjustable in a plane at right angles to the axis of said loopwheel to vary the distance between the delivery end of said guide and the leaves of said loop-wheel; also, in the combination ofa yarnguide, a slotted stop-plate, and a loop-wheel to preventthe yarn being thrown too high or l too low by the action of said guide; also, in

pivoting the yarnguides upon a bracket properly supported and so adjustable as to vary the distance between the delivery ends of said guides and the leaves of the loop-wheel; also, in a slotted stop-plate placed between the delivery ends of said guides and the loop-wheel to prevent the yarns being thrown too high or too low by the guides, all as herein described.

Figure 1 represents an elevation of our invention. Fig. 2 is a plan of the same.

A is a ratchet-wheel, resting on a horizontal plate, B, (supported on the top of the frame 0 of a spring-needle circular-knitting machine,) and turning on the stud D. On the stud also swings the arm E, which projects beyond the ratchet-wheel far enough to be struck by a projection, F, on the needle-cylinder Gr at each revolution of the latter.

To the under side of the arm E is attached a pawl, H,which is connected bya pin through the arm to the piece I and turns with it. A spring, Z, against the piece I, holds the pawl against the ratchet. The spring J throws the arm back, after the projection F has passed, against the stud K. One or more cams, L L, on the top of the ratchet-wheel, raise the lower end of the T-shaped lever M, (the stem of said lever being pivoted to the enlarged part of the stud 1),) carrying the upper end of said lever towardsaid stud D, a spring, N, throwing the lever back when the cam has passed.

Upon a surface of the adjustable bracket P, which is parallel, or nearly so, to the axis of the loop-wheel U, are pivoted two yarn-guides, O O, the same being sheet-metal levers. The bracket P is held upon an inclined face at the top of the stud l) by means of a set-screw, V, so that by turning the bracket slightly around said screw the ends of the guides are brought nearer to or carried farther away from the loop-wheel.

Through slots R B, one at the outer end of each guide, projects a pin, Q, on the end of the lever M, this pin passing through the guides at right angles to them, and said slots R B being cut inward from near the outer end of the guides on a slant, one, R, up and the other, H, down, so that the motion of the lever M causes the inner ends of the guides to pass each other in arcs of circles. colored yarns are passed through the eyes SS, and also through the eyes T T, and the inner ends of the guides beingplaced as near as possible to the loop-wheel, one of the eyes T T conveys a yarn to the upper and the other to Different the lower section of the loop-wheel U. This loop-wheel is of the form shown and described in the application of said Bradley for patent for improvement in loop-wheels for knittingmachines, filed April 17,1878, and has a series of ,teeth recessed below and full above, an, and another series of teeth full below and recessed above, as, the full parts of the teeth always bringing their yarn to the face of the fabric on both sides of the same, thus making vertical stripes in the fabric when yarns of different colors are used. By shiftin g the yarns (carrying each to the others place on the loop-wheel) each stripe is ended in its own color and continued in the other color. The shifting of the guides by the movement of the lever M, actuated by the cams and the spring N, therefore changes the color of the stripes.

A slotted stop-plate, W, may be used to prevent the yarns being thrown out of the loopwheel by the motion of the guides being too great, and avoids the necessity of limiting the motion of the guides with extreme care, as with this plate it is only requisite to throw the yarns to the ends of the slot. The surface of plate WV is parallel to the axis of the loop-wheel IOO U, and so is the slot, the plate being placed between the guides and the loop-wheel.

The slot in the stop-plate should be slightly longer than the distance which the yarn is expected to shift over on theloop-wheel,in order that the yarn may he surely drawn from one section to the other by the guides.

The guides above described and their actir atiug mechanism may be used with any loopwheel which has two sets of nibs-that is, two nibs on each leaf of theloop-wheeland which carries two yarns to shift each yarn from its own set of nihs to the other set, as above described.

Ve claim as our invention- 1. The combination, with the loop-wheel U,

provided with two sets of nibs, ot' the yarnguide 0, provided with the slot R, the lever M, provided with the pin Q, and the cam L, as and for the purpose described.

2. The combination of the loop-wheel U, the yarn-guide O, the stud D, and the bracketP, adjustable in a plane at right angles to the loopwheel U, as and for the purpose described.

3. The combination of the yarn-guide (),the slotted stop-plate'W, and the loop-wheel U, as and for the purpose described.

WILLIAM H. PEARSON. JOHN BRADLEY. Witnesses:

ALBERT M. Moons, JOHN F. FRYE.

i It is hereby certified that in Letters Patent No. 253,224, granted February 7, 1882, to William H. Pearson and John Bradley for an improvement in Thread-Guide Mechanism for Knitting Machines, the paragraph commencing with the word also, in line 23, and ending Witn the Word described, in line 31, on page 1 of the printed specification attached to and forming a part of said Letters Patent was erroneously printed and published as a part of said specification; whereas it forms no part thereof, having been stricken out by amendment; that the proper corrections have been made in the files and records of the Patent Office, and are hereby made in said Letters Patent.

Signed, conntersigned, and sealed this 14th day of February, A. D. 1882.

[SEAL.] A. BELL.

Acting Secretary of the Interior.

Oonntersigned E. M. MARBLE,

Oonwnissioner of Patents. 

